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g i neeri ng, and design studies do not canst i tute a contractual <br />ob1 i gat i an under this paragraph . <br />Pass throu h, A discharge which exits the city sewerage <br />system ~ nto water of the Una tell States or state i n quantities or <br />concentrations which, alone or in conjunction with a discharge or <br />discharges from other sources, is a cause of a violation of any re- <br />qui resent , of the city sewerage system NPDES permit ~ i ncl udi ng an <br />~ ncrease ~ n the magna tulle or duration of a vi of ati on} . <br />Person. Any individual , partnership, joi nt-venture, firm, <br />company, cooperative, corporation, association, joint stock company, <br />trust, ,estate, governmental entity ar any other legal entity, The <br />mascul ~ ne gender shall ~ ncl ude the feminine and the singular shat 1 <br />include the plural . <br />. pH, . The logarithm abase 10} of the reciprocal of the hydrogen <br />~ on act ~ v ~ ty expressed ~ n moles per 1 i ter of sot ut i an . <br />Pol 1 utant . Any element or compound discharged into the city <br />sewerage system except water unless the water has been heated, <br />coaled or irradiated . <br />Pot l uti on . The a1 terat i on Of the chemical , physical , bi o- <br />1 og ical or radiological state of water. <br />Pretreatment. The reduction or elimination of pollutants in <br />wastewater prior to discharge. <br />Process wastewater, Water which, during manufacturing or pro- <br />cess i ng, carves into contact with or results from the production of <br />or use of any raw material , intermediate product, finished product, <br />byproduct or waste product. <br />Restricted substance. Pol 1 utants 1 i sted i n section fi.420 of <br />this code, or as prescribed by the city manager pursuant to section <br />6.415 ~of this code. <br />Sample. Any portion of wastewater represent i ng a d i scharge, <br />which may be a grab sample, or a composite of several samples rep- <br />resent ~ ng the sewer d ~ scharge over a peri od of time . <br />Seprta~e waste. Domestic waste extracted from a sewage con- <br />tainment system. <br />5IC number,. A classification pursuant to the Standard Indus- <br />tri al Classification Manual issued by the Executive Office of the <br />President, Office of Management and Budget, 1912 . <br />Si n i f i cant industrial user. Any industrial user which; <br />~a} Is subject to categorical pretreatment standards <br />under 40 CFR 403.fi and 40 CFR Chapter I, Subchapter N or <br />rules promulgated by the city manager, ar <br />fib} Has significant amount of toxic pollutants in its <br />wastewater, as determined by the city manager, or <br />~c} Discharges an average of at least 25, 000 gal 1 ans per <br />day of wastewater ~excl udi ng domestic waste} i n any period of <br />12 consecutive calendar months, ar <br />` ~d} Discharges water, including wastewater, which on any <br />day ~ n any per od Of 12 consecutive calendar months consti - <br />tutes at least five percent of the average daily dry weather <br />hydraul ~ c or organ ~ c capacity of the city sewerage system, or <br />fie} Is determined by the city manager to have a reason- <br />able potential for adversely affecting the city sewerage sys- <br />tem' s operation or for violating any pretreatment standards . <br />Ordinance - 5 <br />